Samsung 6400 series User Manual page 178

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Self Diagnosis
● Picture Test: Use to check for picture problems. Picture test displays a high
definition picture that you can examine for flaws or faults.
Yes: Select Yes if the test picture does not appear or there is noise or distortion
in the test picture. There may be a problem with the TV. Contact Samsung's
Call Center for assistance.
No: Select No if the test picture displays properly. There may be a problem
with your external equipment. Please check your connections. If the problem
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persists, refer to the external device's user manual.
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